Ole B Suhr, Martha Grogan, Ana Martins da Silva, Chafic Karam, Pablo Garcia-Pavia, Brian Drachman, Wagner Zago, Radhika Tripuraneni, Gene G Kinney
{"title":"PRX004治疗变异型淀粉样转甲状腺素(ATTRv)淀粉样变性病:1期开放标签剂量递增研究结果。","authors":"Ole B Suhr, Martha Grogan, Ana Martins da Silva, Chafic Karam, Pablo Garcia-Pavia, Brian Drachman, Wagner Zago, Radhika Tripuraneni, Gene G Kinney","doi":"10.1080/13506129.2024.2420809","DOIUrl":null,"url":null,"abstract":"<p><strong>Background: </strong>The investigational monoclonal antibody PRX004 is designed to specifically target and deplete TTR amyloid. Here, we report on the safety, tolerability, pharmacokinetics, pharmacodynamics and preliminary clinical activity of PRX004 in patients with ATTRv amyloidosis.</p><p><strong>Methods: </strong>This global, multicentre, phase 1 trial comprised a 3 + 3 dose-escalation phase and a long-term extension (LTE) phase (NCT03336580). In the dose-escalation phase, patients received PRX004 (0.1, 0.3, 1, 3, 10 or 30 mg/kg), administered intravenously every 28 days for 3 months. In the LTE, eligible patients could receive up to 15 additional doses. Patients who received doses of ≥3 mg/kg for ≥9 months were assessed for Global Longitudinal Strain (GLS) and Neuropathy Impairment Score (NIS). The primary objective was to determine the maximum tolerated dose (MTD) of PRX004.</p><p><strong>Results: </strong>Overall, 21 patients with ATTRv amyloidosis completed the dose-escalation phase; 17 subsequently enrolled in the LTE. The MTD was not reached. PRX004 was well tolerated at all doses, with dose-proportional exposure. GLS and NIS were improved or maintained over 9 months (<i>n</i> = 7).</p><p><strong>Conclusions: </strong>PRX004 was well tolerated in patients with ATTRv amyloidosis and demonstrated potential clinical activity. A phase 2 randomised controlled trial in ATTR cardiomyopathy is ongoing (NCT05442047).</p>","PeriodicalId":50964,"journal":{"name":"Amyloid-Journal of Protein Folding Disorders","volume":" ","pages":"1-8"},"PeriodicalIF":5.2000,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"PRX004 in variant amyloid transthyretin (ATTRv) amyloidosis: results of a phase 1, open-label, dose-escalation study.\",\"authors\":\"Ole B Suhr, Martha Grogan, Ana Martins da Silva, Chafic Karam, Pablo Garcia-Pavia, Brian Drachman, Wagner Zago, Radhika Tripuraneni, Gene G Kinney\",\"doi\":\"10.1080/13506129.2024.2420809\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Background: </strong>The investigational monoclonal antibody PRX004 is designed to specifically target and deplete TTR amyloid. Here, we report on the safety, tolerability, pharmacokinetics, pharmacodynamics and preliminary clinical activity of PRX004 in patients with ATTRv amyloidosis.</p><p><strong>Methods: </strong>This global, multicentre, phase 1 trial comprised a 3 + 3 dose-escalation phase and a long-term extension (LTE) phase (NCT03336580). In the dose-escalation phase, patients received PRX004 (0.1, 0.3, 1, 3, 10 or 30 mg/kg), administered intravenously every 28 days for 3 months. In the LTE, eligible patients could receive up to 15 additional doses. Patients who received doses of ≥3 mg/kg for ≥9 months were assessed for Global Longitudinal Strain (GLS) and Neuropathy Impairment Score (NIS). The primary objective was to determine the maximum tolerated dose (MTD) of PRX004.</p><p><strong>Results: </strong>Overall, 21 patients with ATTRv amyloidosis completed the dose-escalation phase; 17 subsequently enrolled in the LTE. The MTD was not reached. PRX004 was well tolerated at all doses, with dose-proportional exposure. GLS and NIS were improved or maintained over 9 months (<i>n</i> = 7).</p><p><strong>Conclusions: </strong>PRX004 was well tolerated in patients with ATTRv amyloidosis and demonstrated potential clinical activity. 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PRX004 in variant amyloid transthyretin (ATTRv) amyloidosis: results of a phase 1, open-label, dose-escalation study.
Background: The investigational monoclonal antibody PRX004 is designed to specifically target and deplete TTR amyloid. Here, we report on the safety, tolerability, pharmacokinetics, pharmacodynamics and preliminary clinical activity of PRX004 in patients with ATTRv amyloidosis.
Methods: This global, multicentre, phase 1 trial comprised a 3 + 3 dose-escalation phase and a long-term extension (LTE) phase (NCT03336580). In the dose-escalation phase, patients received PRX004 (0.1, 0.3, 1, 3, 10 or 30 mg/kg), administered intravenously every 28 days for 3 months. In the LTE, eligible patients could receive up to 15 additional doses. Patients who received doses of ≥3 mg/kg for ≥9 months were assessed for Global Longitudinal Strain (GLS) and Neuropathy Impairment Score (NIS). The primary objective was to determine the maximum tolerated dose (MTD) of PRX004.
Results: Overall, 21 patients with ATTRv amyloidosis completed the dose-escalation phase; 17 subsequently enrolled in the LTE. The MTD was not reached. PRX004 was well tolerated at all doses, with dose-proportional exposure. GLS and NIS were improved or maintained over 9 months (n = 7).
Conclusions: PRX004 was well tolerated in patients with ATTRv amyloidosis and demonstrated potential clinical activity. A phase 2 randomised controlled trial in ATTR cardiomyopathy is ongoing (NCT05442047).
期刊介绍:
Amyloid: the Journal of Protein Folding Disorders is dedicated to the study of all aspects of the protein groups and associated disorders that are classified as the amyloidoses as well as other disorders associated with abnormal protein folding. The journals major focus points are:
etiology,
pathogenesis,
histopathology,
chemical structure,
nature of fibrillogenesis;
whilst also publishing papers on the basic and chemical genetic aspects of many of these disorders.
Amyloid is recognised as one of the leading publications on amyloid protein classifications and the associated disorders, as well as clinical studies on all aspects of amyloid related neurodegenerative diseases and major clinical studies on inherited amyloidosis, especially those related to transthyretin. The Journal also publishes book reviews, meeting reports, editorials, thesis abstracts, review articles and symposia in the various areas listed above.